Any municipality having obtained a plant for the purpose, under the authority of this chapter, may manufacture, generate and distribute gas or electricity for furnishing light for municipal purposes or for the use of the inhabitants, under such regulations and conditions as it establishes, but no municipality shall be compelled to furnish gas or electricity to any person or corporation, except by order of the commissioners mentioned in section 7-216, after payment of any assessment provided for in section 7-219. Any person or corporation aggrieved by the refusal of any municipality acting under the authority of this chapter to supply gas or electricity may appeal to such commissioners, setting forth in such appeal what is asked of such municipality in such detail as the commissioners require. If it appears that additional cost to the municipality for plant is likely to be necessary, the commissioners may require the municipality forthwith to cause to be made the assessments, if any, provided for in section 7-219, upon the owners or occupants of the premises to which the gas or electricity applied for is required to be supplied, and the municipality shall at once comply with the request. The commissioners shall then hear all the parties interested, and judge whether, under the circumstances of the case, it is reasonable to require such municipality to furnish gas or electricity in any manner covered by the claims in the appeal. In making their decision, they may take into consideration the extra cost to the municipality, with any other peculiar circumstances of the case, and whether, after the amount of all the other assessments is paid, the extra supply required can be furnished without incurring an expense beyond the appropriation for gas or electrical purposes for that year. Unless it is made to appear that the expense cannot be so met, they may, if they find it reasonable, make an order in which they may define the amount, quality, manner, locality and times of supplying gas or electricity, and may require the municipality to furnish the same to the party applying, as directed in the order, and such municipality shall, without delay, after the payment of the assessments, comply with the order. Any order or request made to any town under this section shall be transmitted to the selectmen, to any city to the mayor and to any borough to the warden of the borough. The Superior Court shall have jurisdiction in equity to enforce compliance with any order or request made under this section, by appropriate process.